saleem Mobile Phone 15

7/28/2019 saleem Mobile Phone 15

1/21

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* MOBILE NOTES* PRACTIALS

NOTES

1} HOW MANY TYPES OF MOBILE PHONES ?

a} four types of mobile phonesStraitflapsliderotrate

2} THREE TYPES OF DISPLAY?a} soldering

connector

strip

3} FIVE TYPES OF MEMMORY CARDS?a} micro sd

d v n c p for 6600 6670 6680 6681 7610 3230 n72 n70

etc....mini sd n73 n93 i mate mobiles etcm2 sony erisconpro duo sony eriscon w810i p990i
mailto:[email protected]:[email protected]


2/21

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cameras1} there are three types of cameraconnector

stripsoldering

mobile problems

Th ere are23twenty three problems in mobile phones

1} speaker H/W

2} ringer H/W3} mic H/W4} no led key board and display H/W5} no charging H/W6} phone on but no display H/W & S/W7} phone on but white display H/W & S/W8} battery low when calling after show full battery H/W9} restart when calling H/W & S/W10} no network H/W & S/W11} operaction failed camera H/W & S/W12} camera features not supported H/W & S/W13} black or white display on camera H/W & S/W14} memmory card not supported H/W & S/W

15} insert sim card H/W16} keypad problem H/W & S/W17} contact service H/W & S/W18} bluetooth problem H/W & S/W19} local mode or test mode H/W & S/W


3/21

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20} handfree problem H/W & S/W21} phone heat H/W22} phone hanging H/W & S/W

23} phone dead H/W & S/W

problems and there soluction andthere cheakings .

1} speaker cheaking ?

a} if two side buzzer then its okon mother board tips two side same value then ok

speaker problems1 low sound2 no sound3 disturbance sound

answers1 low soundfirst cheak volume full or not if volume is full then also lowsound change it

2 disturbance soundopen phone clean dust clean speaker then also not ok

change it

3 no soundcheak the volume if volume is full thnopen the phone cheak the speaker 2 side buzzer if not


4/21

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change it

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2} ringer cheaking ?a} if two side buzzer then its okon mother board tips two side same value then ok

ringer problem?1 low sound

2 no sound3 disturbance sound

answers1 low soundfirst cheak volume full or not if volume is full then also lowsound change it

2 disturbance soundopen phone clean dust clean speaker then also not okchange it

3 no soundcheak the volume if volume is full thnopen the phone cheak the speaker 2 side buzzer if notchange it

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5/21

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3} mic cheaking ?a} one side value one side nothing then its ok

mic problems ?1 low sound2 no sound3 disturbance sounde c o sound

answers1 low sound

open phone clean carbon dust if no result change mic

2 disturbance sound e c o soundopen phone clean carbon dust if no result change mic

3 e c o soundopen phone clean carbon dust if no result change mic

4 no soundopen phone clean carbon dust if no result change miclight heat nearest componentscheak p c b tipsone side value one side nothing okfrom ground one side value one side buzzertwo side nothing tracks missingtwo side buzzer tips short

two side nothing on pcb mick follow the track make thejumperheat nearest components if components damaged replace


6/21

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it from dead p c b heat nearest componentsreplace ic diode or capacitor

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4} no light in key board & display ?

answerfirst cheak phone settings lights on or off

if it is not working open the phone cheak displayconnector and clean display connectorcheak strip & strip connector

put new stripcheak another displaycheak p c b condictionclean p c b with ip

heat light section nearest booster coilsome phones no ic only diodesmake a jumperreplace ic or diodechange ic or diode

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5 not charging ?not charging problems1 charging not supported

2 charging symbol showing but not charging


7/21

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3 charging not showing4 not charging5 charging time phone heat

6 charging time phone offin china phones1 bad contact charger

2 charging error3 connect usb4 remove charger5 some time charging some time not charging

answers

first cheak chargercheak another batterycheak charging connector

1 charging not supported

first cheak chargercheak another batteryopen phone cheak p c b condiction if carbon or dust cleanitcheak charging tips two side values ok two side buzzer tipsshort from groundcheak fuse and coilfuse two side buzzer okcoil two side buzzer okheat charging section make a jumper replace ic or diodesflash phone

same answer for 2 3 4 question


8/21

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6 phone on but no display ?problems

1 half display2 display inside dots3 display not clear4 display dim5 display broken

answersblue display sometime showing some time not showingopen phone cheak display connector & cleanif soldering display resolderingcheak another display if same problemresoldering display connector

or change display connectorif same problem in slide or rotate pnone change strip

same soluction for 2 3 4 5 question__________________________________________________________________________________________

7 phone on white display ?

answerfirst cheak phone on or offif phone is off hard ware problemif phone is on software problem


9/21

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incomming out going working hard ware problem

flash u i settings

open phone cheak display connectorif dust or carbon clean itcheak another displayresoldering display connectorheat nearest componentscheak components if components damage replace fromanother dead boardif components ok then heat display ic replace ic and

change display ic_________________________________________________________________________________________

8 battery low when caling after show full battery ?answersfirst cheak another batterycheak weather it is loose or tightreset and formatopen phone cheak board condiction & clean dustheat power amplifierchange power amplifier

___________________________________________________________________________________________9 restart when calling ?

answerfirst cheak another batteryreset onlyflash the phoneopen phone cheak board condiction & clean


10/21

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cheak battery loose or tightheat nearest componentsheat pa replace pa

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10 no network ?no network problems1 out side network inside no network

2 network jumping3 network is full but no calls are connecting

4 no network at all5 network comes phone off6 calling time no network7 emergency callanswers1 outside network inside no network

open phone cheak antina & antina tips2side buzzer okcheak wheather they are connecting correct or notheat network section { antina tips pa rx tx rf 26mhz }flash phone pm filesreplace antina switch and p a

same soluction for 2 question

3 network is full but no calls are connectingcheak another sim cardreset and formatsoftware ui settings


11/21

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heat pa & rx & txheat RFICreplace 26mhz

4 no network at allcheak another sim cardcheak network manually settingsopen phone cheak antina and tipsclean carbon dustheat network sectionfollow the tracks make a jumper

software updates pm filesreplace antina switchreplace pa change pa

5 network comes phone is offfirst cheak another batteryflash phone & ui settings

heat pa replace paheat nearest components of icchange pa

6 call time no networkreset and formatheat network sectionflash ui settings replace pa

7 emergency callsreset and format

jumper antina tips short themheat network section


12/21

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flash ui settings______________________________________________________________________________________

11 operaction failed camera ?problems in china phones1 camera not readycamera module not readyreset and formatopen phone clean camera tipsif soldering resoldering tips

flash phoneheat nearest componentschange camera

_____________________________________________________________________________________12 camera features not supported ?camera on stand by

reset and formatflash phone & ui settingsopen phone clean camera tipsreplace camerachange camera

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13 black or white display open camera ?problems 12 open camera phone hang3 open camera phone restart4 in samsung phone camera review error


13/21

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5 camera not clear6 camera dim7 reverse direction

8 image not saving9 image not showing10 open camera negative shades11 camera on del some data12 in sony erriscon open lense cover13 in motorolla phone camera busy try later14 camera working flash light not working15 camera general features not supported

16 camera shakinganswers1 reset and formatflash phoneopen phone clean camera tipsreplace camerachange camera

same soluction for 2 & 3 question3 samsung phone preview errorreset or formatcheak another strip if slidereplace cameraflash phonechange camerasame soluction for 5 & 6 questionclean camera glassclean camera leansreplace camerachange camera


14/21

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7 reverse camerarotate phonecheak camera settings

reset & formatflash phone

8 select one option{ phone memmory or mmc }reset & formatflash phonesame soluction for 9 question

10 first cheak camera settingskeep in normalreset and formatflash phonereplace camerachange camera

12 reset & formatcheak camera stripmake a jumperchange stripsame soluction for 13 question14 first cheak settingsreset and fomatopen phone cheak flash light

2side value okif flash light is black change flash lightcheak flash light tips1side value 1 side nothing ok


15/21

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cheak nearest componentsif components damage change from another dead boardheat components

make a jumpersame soluction for 15 question16 open phone cheak cameraloose or tightreplace cameraheat nearest componentschange camera

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14 memmory card not supported ?memmory card problems1 memmory card corrupted

2 mmc card not showing3 when inserted mmc phone restart

4 insert mmc phone hanging5 insert mmc phone working very slow6 insert mmc phone dead7 in china phones mmc format8 china phones not showinganswers1 first cheak another mmcreset and formatopen phone clean mmc connectorheat nearest mmc componentsflash phonereplace icchange ic


16/21

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same soluction for 2 & 3 question4 scan mmc in systemformat mmc

reset and formatopen phone clean mmc connectorheat nearest componentsflash phonesame soluction for 5 question6 format phoneformat mmc

7 cheak another mmcresoldering mmc connectorheat nearest componentsfollow the tracks and make a jumperchange mmc connector

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15 insert sim card ?cheak battery loose or tightcheak another sim cardcheak battery connectorcheak sim connector values1 side buzzer 1 side nothing 4 valuesheat nearest components and icreplace ic some phone diodechange icfollow the track make a jumper

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17/21

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16 key pad problem ?____________________________________________________________________________________________

17 contact service ?first flash phoneopen phone cheak pcb condictionand clean if dustheat flash i cheat power ic nearest componentsafter confirm custmer flash phonereplace flash ic

change another flash ic from dead board___________________________________________________________________________________________18 blueetooth problem ?biueetooth problems1 device not found

2 searching failed

3 sending failed4 bluetooth not on5 bt not ready6 bt error7 bt on phone reastart8 delete some device9 bt symbol not showing10 bt busy11 bt not activeanswers1 first cheak phone visilibityreset and formatopen phone heat bt with paste


18/21

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flash phonesame answer for 23 first cheak memmory space

flash the phone and ui settingsheat bt sectionreplace bt antinachange bt antina4 reset and formatopen phone clen dustheat bt sectionflash phone

some answer for 5 6 10 117 reset and formatflash the phoneheat bt section8 cheak device list and delete devicereset and format

flash phone

9 cheak data sending or notreset and formatflash phone________________________________________________________________________________________19 local mode test mode ?open phone & clean charging section and handfree sectionheat charging section and handfree sectionreplace charging connectorchange charging connectorflash phone


19/21

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______________________________________________________________________________________________20 handsfree problem ?

first cheak profilereset phoneopen phone clean carbon dustheat nearest components near handfree sectionreplace connectorchange connectorflash phone{ car mode phone }

reset phoneopen phone clean dustheat nearest components near handfree sectionreplace connectorchange connectorflash phone{ insert hand free phone restart }

cheak another handfreereset and formatheat hf sectionreplace hf connectorchange connectorcheak components if components damage changecomponents{ handsfree symbol not showing }Cheak another hfresoldering hf connectorheat nearest componentsreplace connector change connectorsome phones ic heat it replace and change it


20/21

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____________________________________________________________________________________21 phone heat ?

calling timenormal timecharging timewhile playing mp3 and vediofirst cheak another batteryopen phone cheak charging connectorreplace charging connectorheat pa

replace pa__________________________________________________________________________________________22 phone hanging ?phone blinkingsim insert phone restartopen any folder phone restart

phone working very slowreset and formatflash phoneopen phone clean carbon dustheat flash icheat power ic nearest componentsflash phonereplace flash ic

phone blinkingfirst cheak another batteryloose or tightremove mmc and cheakreset and format


21/21

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flash phoneheat flash ic replace flash ic

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_______________________________________________23 phone dead ?water damagefallen downworking phonefirst cheak three pointsbatteryon /off switch

battery connector

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saleem Mobile Phone 15

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